Jeff: Crap. I screwed up the trade-item, my bad.

121 STARMIE

Give a Staryu a Water Stone and you have a weapon of mass destruction. Starmie was always one of my go-to Pokemon for the Elite Four. My first one, in RBY, was named Light; I gave it Bubblebeam from the Misty TM and waltzed gleefully through Bruno's team.